The key to a great looking wax is great looking paint. Use a clay to get the big pieces of stuff, then use a polish. Look for swirls and other light scratches to go away as you polish. With a synthetic product like Zaino, those things can be highlighted. Softer carnuba waxes will often fill in those scratches making them less apparent. They also don't gloss as much as they give a deep luster. It's all what the user prefers.

I can't stress enough, though: Paint prep! Clay then polish. You will notice that your paint is smoother even after just the clay bar. Lots of people use a spray clay lube on the surface of the paint to help it glide along. I also prefer to use the spray, but I add a little extra to the process. I put a BUNCH of soap (three ounces or so) in a bucket and add a little water (1/4 full at most). I use a wash mit to go over the (already washed) surface I am about to clay. I then dip the clay in that slick mixture to get a nice slick piece. I use the spray lubricant to add just that much more. Maybe that is too much product, but it works for me. Don't forget to check your clay and fold it back onto itself periodically. It will get REALLY black along the window trim.

Whatever is on your paint will shine through your wax.